I have TMX and it is being taken over by the Sister company/. They want me to surrender the stock. What happens if I don't do it? It will be delisted I know, what then?

I'm assuming you're asking about the acquisition of outstanding Telmex shares (stock symbol TMX) by America Movil . If you don't surrender your shares you end up holding a worthless stock certificate once TMX is delisted.

If instead you're asking about TMX Group in Toronto, please post back to clarify.